Tectonic Therapeutic Ownership & Insider Activity

Tectonic Therapeutic (TECX) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 25.8% of shares outstanding. Institutional investors hold 31.3%.

Shares Outstanding

19.549M

Shares Float

9.667M

Insider Shares Owned

5.035M

Insider % Owned

25.8%

Institutional Shares Held

6.128M

Institutional % Held

31.3%

Ownership Breakdown

Net Insider Activity by Month

Tectonic Therapeutic Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Aug 25, 2026	Peter McNamara	CHIEF SCIENTIFIC OFFICER	SELL-OPTIONS	—	$25.62	$938
Aug 12, 2026	Peter McNamara	CHIEF SCIENTIFIC OFFICER	SELL-OPTIONS	—	$24.86	$872
Jun 30, 2026	Peter McNamara	CHIEF SCIENTIFIC OFFICER	SELL-OPTIONS	—	$24.86	$3K
May 4, 2026	Marcella Ruddy	CHIEF MEDICAL OFFICER	SELL	1.065K	$30.00	$32K
Apr 1, 2026	Marcella Ruddy	CHIEF MEDICAL OFFICER	SELL	1.000K	$31.05	$31K